The Model 6600-M4 is a 3-channel system designed to test military aircraft with AoA / AoS / SmartProbe™️ capability. The tester has one Static output (Ps1), one Pitot output (Pt) and a third output (Ps2) which can be used to simulate either AOA or AOS. It is used to perform leak checks and RVSM accuracy checks on the Pitot-Static systems – including altimeters, airspeed/Mach indicators, VSI’s, air data computers, autopilots – and can be done at low airspeeds. The 6600-M4 can be tested from the cockpit. The tester includes built-in vacuum and pressure pumps and emergency manual bleed-down valves. It can use “profiles” to run through an entire test range using a single key.